Effects of humic acid on arsenic(V) removal by zero-valent iron from groundwater with special references to corrosion products analyses

Heavy metal removal from water required reliable and cost-effective considerations, fast separation as well as easy methodology. In this piece of research, nanozerovalent iron (NZVI) was prepared as ideal sorbent for Pb 2? removal. The sample was characterized using X-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), and atomic force microscope (AFM-SPM). Batch experiments comprised the effect of pH value and contact time on the adsorption process. The same NZVI was stored for a shelf time (10 months) and the batch experiment was repeated. The outcomes of the investigation assured that NZVI publicized an extraordinary large metal uptake (98%) after a short contact time (10 h). The stored sample revealed the same effectiveness on Pb 2? removal under the same conditions. The results of the physical properties, magnetic susceptibility, and conductance were correlated with the adsorption efficiency. This work offers evidence that these NZVI particles could be potential candidate for Pb 2? removal in large scale, stored for a long time using a simple, green, and cost-effective methodology, and represent an actual feedback in waste water treatment.

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“…or mainly Fe 3? species, which can be described as follows (Geng et al 2009;Uzum et al 2009;Morgada et al 2009;Rao et al 2009):…”

Section: Introductionmentioning

confidence: 99%

Effective Pb2+ removal from water using nanozerovalent iron stored 10 months

et al. 2017

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“…Despite a broad consensus on reductive transformations [1] whereas metals, metalloids and radionuclides may be removed via reductive precipitation, surface adsorption or complexation, or co-precipitation with the Fe oxyhydroxides that are generated in the system [2][3][4]. The validity of this concept is progressively questioned [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Characterizing the reactivity of metallic iron in Fe0/EDTA/H2O systems with column experiments

Noubactep¹

2010

Chemical Engineering Journal

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“…The studies regarding the interactions between arsenic and humic acid (HA) as the main component of NOM in order to optimize the classical coagulation using ferric chloride have been reported [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…The inhibition effect of HA presence on the arsenic sorption on iron oxides was demonstrated [4,5]. The conventional coagulation process is considered to be appropriate for the removal of both arsenic and NOM in a single step [4].…”

Section: Introductionmentioning

confidence: 99%

Drinking water treatment by iron anode-based electrocoagulation: humic acids and arsenic removal

Pop

Bordianu

Pode

et al. 2016

WIT Transactions on Ecology and the Environment

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Electrocoagulation (EC) represents an alternative to the conventional coagulation process in water treatment in low-capacity plants. Besides the electrode materials, the performance of electrocoagulation is strongly dependent on the raw water matrix. A systematic study has been conducted in this paper in order to optimize the electrocoagulation process operation using iron anode for groundwater with high organic loading and arsenic. The optimization of electrocoagulation parameters was performed, focusing on initial concentration of arsenic and humic acid, current density, the presence of major ions dissolved in water (SO4 2-, Cl -). Humic substances were quantified in terms of absorbance at 254 nm and total organic carbon (TOC) and the arsenic concentration has been assessed in water samples by atomic absorption spectrometry. To elucidate some mechanistic aspect, SEM/EDAX analysis was performed. A systematic study based on various raw water characteristics has been performed for EC process based on iron electrodes to determine the best operating conditions and also, to identify the limits of this process. The specific energy consumption was calculated in order to demonstrate also the process viability from economical point of view. Various treatment scenarios in relation to raw water characteristics and operation conditions were applied in order to determine the optimal conditions regarding process parameters correlated to the range of water characteristics for the drinking water treatment.

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Effects of humic acid on arsenic(V) removal by zero-valent iron from groundwater with special references to corrosion products analyses

Cited by 106 publications

References 39 publications

Effective Pb2+ removal from water using nanozerovalent iron stored 10 months

Effective Pb2+ removal from water using nanozerovalent iron stored 10 months

Characterizing the reactivity of metallic iron in Fe0/EDTA/H2O systems with column experiments

Drinking water treatment by iron anode-based electrocoagulation: humic acids and arsenic removal

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